DescriptionSite of the Whirly Holes, Caerwent - geograph.org.uk - 157916.jpg
English: Site of the Whirly Holes, Caerwent Vast springs of fresh water used to emerge here on the banks of the Neddern Brook. Then on 16th October 1879 the driving of the Severn Tunnel breached a water-filled cave, flooding the tunnel and causing the Whirly Holes to dry up. All that can be seen now are two shallow depressions on either side of the river, which here is in flood. The larger, on the north bank, can be seen in front of the pair of Lombardy Poplars.
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== {{int:filedesc}} == {{Information |description={{en|1=Site of the Whirly Holes, Caerwent Vast springs of fresh water used to emerge here on the banks of the Neddern Brook. Then on 16th October 1879 the driving of the Severn Tunnel breached a water-fill